how does that help us? >> well, certainly you're going to be analyzing -- this is going to be the biological time probably of the time, of the era. you want to know, is it dna? do you recognize how the amino acids are put together? does there appear to be something like dna and rna that consists of other amino acids that are in a different order and it's just a different program? um, that -- the significance, you can imagine, is two-sided. one, there will be some possibility that that means that life started first on mars, and we are martians. that'd be a surprise. or life was independently created on mars, here your closest planet which doesn't look that lifelike today, habitable, and now we're discovering thousands of planets out there, and we'll soon know of many where life could be. that will suggest it's much more likely that those planets that the keepler mission is finding, keppler, could have life on it. that'll raise the probability incredibly. >> is there a goal whether expressed or implied, when